Volume : 3, Issue : 6, June - 2014

Repellency and Toxicity of Some Plant Extracts Against Tribolium castaneum (Herbst)

Santa Kalita, R. K. Bhola

Abstract :

Dichloromethane extract of Lantana camara L., Jatropha curcas L., Calotropis procera Ait. and Datura metel were evaluated for their repellent effects and mortality on the stored grain pest, Tribolium castaneum (Herbst). The plant extracts exhibited significant effects on T. castaneum. Highest repellency (80%) was recorded when 8mg/ml extract from Jatropha curcas was used for 24 hour exposure time against T. castaneum followed by Calotropis procera (72%), Lantana camara (62%) and Datura metel (52%). The extracts showed significant toxic effects against T. castaneum producing higher mortality than the control. J. curcas showed strongest toxicity with LC 50 value of 40mg/g followed by C. procera (46.5mg/g) and L. camara (53mg/g). Of the four extracts studied, D. metel showed the least toxicity with LC 50 value of 66mg/g.